davids-en



3 SheAe'ts-She-et Vl.

(No Model.)

M. DAVIDs-B-N.

l (ENTRUE'UGALMACHINE.`

No. 605,087. PatentedJune?, 1.898.

UNITEDV STATES PATENT ERICE.-

MEYER DAvInsEN,

on PARIS, FRANCE.

CENTRIFLIGAL,IVIACi-IINE.'V

SPECIFICATION forming par: 5f Letters Patent No. 605,087, dated June 7, 1898.

Application filed December 30, 1897.

Serial No. 664,784'. -(Nolmolslel.) `:Patented in France April 15,1896,N0. 255,563, and

'in cernany Nd'vembe 30,1895, No; 95,055. A

To all whom t may concern.-

Be it known that I, MEYER DAvIDsEN,"a` subject of the King of Denmark, anda resident of Paris, in theRepublic o f France, have invented certain new and useful Improvements in Centrifugal Machines, v(for which patents have been obtained'in France, No. 255,563, dated April l5, 1896; andin Germany, No. 95,055, dated November 30, 1896,)"of

which the following is an exact specification.

This invention relates to improvements in centrifugal machines for the purpose of sepa,

of one formof my improved apparatus,while.

Figs. 4,5, and 6 illustrate in a similar manner another form of my invention.

Proceeding to describe the drawings, I re mark the horizontal drum a is provided with rotating journals h, tightly attached to the drum or cylinder cover and rotating in bear- Through one of these hollow journals b, Figs.'l and 2, is arranged a tube d for the'purpose of 'conducting the material to be treated into the centrifugal apparatus,

while through the other journals b a hollow 4shaft h is journaled, said shaft being provided with a screw g in such manner that the velocity of the shaft hor the screw g is independent of the rotation ofthe drum ct. When the drum a quickly rotates, the material orA mass under treatment comes to lie against the inner wall of the drum, and the screw g2 (in consequence of the same dipping into the materiallrotates' at an equal speed with the drum. If, however, the screw g is hindered bythe arrangementof a brake device upon the shaft'hfrom following the drum a at the above-mentioned equal speed-1I. e., a lesser speed imparted to the screw g-then the solid `portion of the material under treatment is transported or carried along by said screw in ja "direction p'arallelv'to' the longitudinal axis of tithe drum and eventually discharged from .the V'apertures f, provided for this purpose; `vFor the discharge offthe liquid, however, (from-ythe mantle of the`drum,) I provide 'smaller'apertures e, las' lshown in Fig. 1.

' Proceeding to describe, the main feature of my invention-viz., `the brake device hereinbeforementioned-is so constructed as to permit-of varying the power of the same in an easy and yconvenient manner during the operation of the machinery and simultaneously of regulating the velocity with which the material passes through the drum, (and is eventually ejected,) as from this speed the more or less efficient and complete ejection of the material is dependent.

VVThe application of my improved brake deavice can, forfinstance, be arranged in such manner that a cheek-brake is located directly 1 upon the 4screw-shaft h, or 'said brake may also be separate from the screw-shaft h and connected with the same by a belt and pulley. In" the accompanying drawings two modifiedwdevices or constructions for the actuation of the drum o. and the screw-shaft hare represented, of which Figs. l to 3 show the same driven by means of belt and pulley b. Inthis construction the wings of the centrifugal pump n are located upon the shaft h, the inlet and outlet of which are connected by tubing o, in which the control-valve s, Fig. 3, is situated. This control-valve can be adjusted either by hand or by a governor q, driven from the drum a, by means of belt and pulley b. It is thus possible at anymoment' to change 4the speed of the transport-screw g.

The Yspeed with which the material passes constant and unvarying during the continu- IOO ous working of the machine. Through the hollow shaft 7L any desired liquid or steam can be introduced and mixed with the material under treatment.

The centrifugal apparatus illustrated in Figs. t to G differs only from the hereinbefore described in that an electromotor is used as driving power. In this case the armature of the electromotor fr is attached to the journal b, Figs. et and 5, of the drum a. To here produce the difference in speed between the drum c and the screw g, the armature of a dynamo is attached to the shaft 7i. The power or strength of the dynamo-current can bc controlled bya rheostat R. If a large resistance is switched in and the current from the dynamo consequently weak, the screw g would carry the material very slowly forward, while when the contrary is the casenamel y, when there is onlya slight resistance and a powerful current-said material would be rapidly propelled by the screw g. In order that the current shall vary as little as possible, the electromagnet winding of the dynamo is switched in the chief circuit of the electromotor. (Not fully shown.) \Vhen, therefore, the motor r quickly rotates, the dynamo vzv will only slowly revolve and will thus effeet the difference in speed. In this case (similar to the adjusting of the valve s, as described with reference to the first system) the rheostats can be adjusted by hand, while the connecting up of the motor yfr and the dynamo n, corresponds in principle to the regulating of the speed in the manner hei-einbefore described with reference to the first system, in which the brake device or governor q is employed. One portion of the current llowing from the dynamo could also be used for the purpose of driving a motor p and thereby effecting the more rapid introduction of the material into the drnnl by the employment of another screw t, or this second motor could be used to produce the current for a suitable number of electric incandescent lamps.

Having thus fully described the nature of this invention, what I desire to secure by Letters Patent of the United States is- In continuousoperating centrifugal machines, the combination with the drum a and the screw g, of brake mechanism, connected to the shaft 7L substantially as and for the purpose hereinbefore set forth.

ln testimony whereof l have signed this specification in the presence of two subscribing witnesses.

MEYER DAVIDSEN.

Vitnes'ses:

EDWARD P. MAcLEAN, J. S. Annncnonmn. 

